Screen shot, Marvel Super Heroes 1966 animated TV series title card: "The Sub-Mariner: "Dr. Doom's Day"

Source: http://www.toonarific.com/pics_root/00002308/marvelsubmarinerlogo.jpg

Though this title card from the segment of a television series is subject to copyright, its use is covered by the U.S. fair use laws because:

1. It illustrates an educational article about the series
2. The image is historically significant
3. The use of the still-image title card will not affect the value of the original animated series nor limit the copyright holder's rights or ability to distribute the original.
4. It is a low-resolution
5. The image is only a small, still portion of a long series of animated segments
6. It is not replaceable with an uncopyrighted or freely copyrighted image of comparable educational value.